Here are some links to useful resources about birding in China:
A Checklist of the Birds of China
A List of Endangered Birds in China
Chinese Currents (Beijing)
China Wild Tour (Tong Menxiu and friends)
Dalian (Tom Beeke on BirdForum)
Hong Kong Birdwatching Society
Per Alström’s Masterclass about phylloscopus and seicercus warblers in China
Shanghai Birds (Devaram Thiru)
Sichuan Birding (Sid Francis)
Sichuan – Parrotbill Bird Tours (Zhu Lei and friends)